# US 11,440,695 B2 · Method for manufacturing metal bottle, and metal bottle

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- Number: US 11,440,695 B2
- Document ID: US11440695B2
- Status: Granted
- Kind: B2
- Application number: 16/471,711
- Filed: 2017-10-10
- Published: 2019-10-31
- Granted: 2022-09-13
- Earliest claimed: 2016-12-22
- Assignees: Toyo Seikan Co., Ltd.
- Applicants: Toyo Seikan Co., Ltd.
- Inventors: Takeshi Aihara; Masaomi Tamura; Toshiyuki Hasegawa; Takeshi Murase; Tomohiko Nakamura; Naoya Matsumoto; Nobuhiro Sasajima
- Web page: https://patentgrep.com/patent/US11440695B2

## CPC

- B21D 51/40: Making outlet openings, e.g. bung holes
- B65D 1/0246: {Closure retaining means, e.g. beads, screw-threads}
- B21D 51/2623: {Curling}
- B21D 51/38: Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B65D 41/04: Threaded or like caps or cap-like covers secured by rotation
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A method for manufacturing a metal bottle having a mouthpiece in an upper part of a bottomed cylindrical bottle body, including forming a screw part on the mouthpiece and then forming a curl at a tip of the mouthpiece. During formation of the screw part, a height of the first-stage screw thread from a tip side in a complete screw part and a height of the second-stage screw thread from the tip side are substantially equal and a distance between an apex part of the first-stage screw thread and a bottle axis is smaller than a distance between the apex part of the second-stage screw thread and the bottle axis. After formation of the curl, a distance between the apex part of the first-stage screw thread and the bottle axis and a distance between the apex part of the second-stage screw thread and the bottle axis are substantially equal.

## Claims

### Claim 1

A method for manufacturing a metal bottle having a mouthpiece part in an upper part of a bottomed cylindrical bottle body, the method comprising: forming a screw part on the mouthpiece part and, after formation of the screw part, forming a curl part at a tip of the mouthpiece part, wherein,
during the formation of the screw part, a height of a first-stage screw thread from a tip side in a complete screw part and a height of a second-stage screw thread from the tip side are substantially equal and a distance between an apex part of the first-stage screw thread and a bottle axis is formed smaller than a distance between an apex part of the second-stage screw thread and the bottle axis and,
after the formation of the curl part, a distance between the apex part of the first-stage screw thread and the bottle axis and a distance between the apex part of the second-stage screw thread and the bottle axis are formed substantially equal.

### Claim 2 (depends on 1)

The method for manufacturing the metal bottle according to claim 1, wherein, after the formation of the curl part, the height of the first-stage screw thread in the complete screw part is larger than the height of the second-stage screw head.

### Claim 3

A metal bottle, comprising a mouthpiece part in an upper part of a bottomed cylindrical bottle body; a screw part in the mouthpiece part, and including a curl part at a tip of the mouthpiece part, wherein a segment of the mouthpiece part extends from the curl part and connects with the screw part, wherein
a height of a first-stage screw thread from a tip side in a complete screw part is larger than a height of a second-stage screw thread from the tip side, and a distance between an apex part of the first-stage screw thread and a bottle axis and a distance between an apex part of the second-stage screw thread and the bottle axis are substantially equal, and
a portion of the segment of the mouthpiece part forms a bottom part of the first-stage screw, wherein the bottom part is angularly offset from a sidewall of the first-stage screw closer to the tip.